Hatch Cover 2 : The fixed or foldable type of covers of the Hatch on the deck are called Hatch Covers. These could be operated manually or mechanically. They make the Hatches water tight.
Shrikant Hathi & Binita Hathi, Maritime Practice in India, Shipping Glossary (7th Ed.), published by the law firm BRUS Chambers, Mumbai, India, 2012. http://bruschambers.com/marine/memo51.htm, (Mrtm - Brit) {567}